diff --git a/core/system/gaming.nix b/core/system/gaming.nix
index 32ae4dc..4290d00 100644
--- a/core/system/gaming.nix
+++ b/core/system/gaming.nix
@@ -1,4 +1,4 @@
-{ config, lib, ... }:
+{ config, lib, pkgs, ... }:
 
 let
   cfg = config.nomarchy.system.gaming;
@@ -16,5 +16,29 @@ in
     programs.gamemode.enable = true;
 
     services.flatpak.enable = true;
+
+    # `services.flatpak.enable = true` ships flatpak but does NOT add any
+    # remotes — without a remote, `flatpak install` and the Discover GUI
+    # can't find anything. nixpkgs has no declarative remote-add API yet,
+    # so we run a one-shot system unit after flatpak.service is ready that
+    # adds the flathub remote idempotently (`--if-not-exists`). Lives under
+    # the gaming preset because Pillar 5 ships flatpak as part of the
+    # gaming wiring; if another preset later needs flatpak, lift this to a
+    # dedicated module.
+    systemd.services.nomarchy-flathub-init = {
+      description = "Register the Flathub remote on first start";
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network-online.target" ];
+      wants = [ "network-online.target" ];
+      path = [ pkgs.flatpak ];
+      serviceConfig = {
+        Type = "oneshot";
+        RemainAfterExit = true;
+      };
+      script = ''
+        flatpak remote-add --if-not-exists flathub \
+          https://dl.flathub.org/repo/flathub.flatpakrepo
+      '';
+    };
   };
 }